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Immunohistochemistry of four stem cell markers in prostate adenocarcinoma and non-cancerous epithelium. NANOG and OCT4 proteins were mainly localized in the nucleus and cytoplasm of the tumor cells of prostate cancer. (A) NANOG expression was strong in cancer cell nuclei, while (E) OCT4 expression was weak (magnification, ×200; scale bars, 50 μm). OCT4, octamer 4.
